html {
    width: 100%;
    height: 100%;
    -webkit-text-size-adjust: 100%;
    font-family: 'Microsoft YaHei';
  }
  #root.white {
    background-color: #fff;
  }
  #root.white {
    background-color: #fff;
  }
  #root.gray {
    background-color: #f5f5f5;
  }
  .mtnone {
    margin-top: 0 !important;
  }
  .mbnone {
    margin-bottom: 0 !important;
  }
  .mlnone {
    margin-left: 0 !important;
  }
  .mrnone {
    margin-right: 0 !important;
  }
  .ptnone {
    padding-top: 0 !important;
  }
  .pbnone {
    padding-bottom: 0 !important;
  }
  .plnone {
    padding-left: 0 !important;
  }
  .prnone {
    padding-right: 0 !important;
  }
  .mt1 {
    margin-top: 0.5rem;
  }
  .mt2 {
    margin-top: 1rem;
  }
  .mt3 {
    margin-top: 1.5rem;
  }
  .mt4 {
    margin-top: 2rem;
  }
  .mt5 {
    margin-top: 2.5rem;
  }
  .mb1 {
    margin-bottom: 0.5rem;
  }
  .mb2 {
    margin-bottom: 1rem;
  }
  .mb3 {
    margin-bottom: 1.5rem;
  }
  .mb4 {
    margin-bottom: 2rem;
  }
  .mb5 {
    margin-bottom: 2.5rem;
  }
  .ml1 {
    margin-left: 0.5rem;
  }
  .ml2 {
    margin-left: 1rem;
  }
  .ml3 {
    margin-left: 1.5rem;
  }
  .ml4 {
    margin-left: 2rem;
  }
  .ml5 {
    margin-left: 2.5rem;
  }
  .mr1 {
    margin-right: 0.5rem;
  }
  .mr2 {
    margin-right: 1rem;
  }
  .mr3 {
    margin-right: 1.5rem;
  }
  .mr4 {
    margin-right: 2rem;
  }
  .mr5 {
    margin-right: 2.5rem;
  }
  .pt1 {
    padding-top: 0.5rem;
  }
  .pt2 {
    padding-top: 1rem;
  }
  .pt3 {
    padding-top: 1.5rem;
  }
  .pt4 {
    padding-top: 2rem;
  }
  .pt5 {
    padding-top: 2.5rem;
  }
  .pb1 {
    padding-bottom: 0.5rem;
  }
  .pb2 {
    padding-bottom: 1rem;
  }
  .pb3 {
    padding-bottom: 1.5rem;
  }
  .pb4 {
    padding-bottom: 2rem;
  }
  .pb5 {
    padding-bottom: 2.5rem;
  }
  .pl1 {
    padding-left: 0.5rem;
  }
  .pl2 {
    padding-left: 1rem;
  }
  .pl3 {
    padding-left: 1.5rem;
  }
  .pl4 {
    padding-left: 2rem;
  }
  .pl5 {
    padding-left: 2.5rem;
  }
  .pr1 {
    padding-right: 0.5rem;
  }
  .pr2 {
    padding-right: 1rem;
  }
  .pr3 {
    padding-right: 1.5rem;
  }
  .pr4 {
    padding-right: 2rem;
  }
  .pr5 {
    padding-right: 2.5rem;
  }
  .pl05 {
    padding-left: 0.5rem;
  }
  .pr05 {
    padding-right: 0.5rem;
  }
  .bb {
    border-bottom: 1px solid #d9dde1;
  }
  .bl {
    border-left: 1px solid #d9dde1;
  }
  .br {
    border-right: 1px solid #d9dde1;
  }
  .bt {
    border-top: 1px solid #d9dde1;
  }
  .bn {
    border: none;
  }
  .color_red {
    color: #f01414 !important;
  }
  .h90p {
    height: 90% !important;
  }
  .l {
    float: left;
  }
  .r {
    float: right;
  }
  .clearfix:after {
    content: ".";
    display: block;
    clear: both;
    height: 0;
    visibility: hidden;
  }
  .brr2 {
    border-radius: 0.0.5rem;
  }
  .brr4 {
    border-radius: 50%;
  }
  .fs0 {
    font-size: 0.4rem;
  }
  .fs1 {
    font-size: 0.5rem;
  }
  .fs2 {
    font-size: 0.6rem;
  }
  .fs3 {
    font-size: 0.7rem;
  }
  .fs4 {
    font-size: 0.8rem;
  }
  .fs5 {
    font-size: 0.9rem;
  }
  .fs6 {
    font-size: 1rem;
  }
  .fs7 {
    font-size: 1.1rem;
  }
  h1,
  h2,
  h3,
  p,
  img,
  a,
  ul,
  button {
    margin: 0;
    padding: 0;
  }
  ul {
    list-style: none;
  }
  button {
    border: none;
  }
  a {
    text-decoration: none;
  }
  body {
    background: #F8FaFc;
  }
  footer {
    height: 7.5rem;
    background: #f3f5f7;
    text-align: center;
  }
  footer .footer-link {
    margin: 0 auto;
  }
  footer .footer-link a {
    position: relative;
    width: 4.4rem;
    height: 3.15rem;
    display: inline-block;
    font-size: 0.7rem;
    color: #71777D;
    line-height: 3.15rem;
  }
  footer .footer-link a em {
    content: '';
    display: block;
    position: absolute;
    left: 0;
    top: 1.15rem;
    height: 0.75rem;
    width: 0.05rem;
    background-color: #c3c7cb;
    zoom: 1;
  }
  footer p {
    font-size: 0.5rem;
    color: #B7BBBf;
  }
  .footer-tip {
    position: fixed;
    bottom: 0;
    width: 100%;
    height: 2.5rem;
    padding: 0.5rem;
    box-sizing: border-box;
    background: #FFFFFF;
    box-shadow: 0 -0.05rem 0.4rem #e2e2e2;
    -moz-box-shadow: 0 -0.05rem 0.4rem #e2e2e2;
    -webkit-box-shadow: 0 -0.05rem 0.4rem #e2e2e2;
    z-index: 4;
  }
  .footer-tip .imooc-icon {
    display: inline-block;
    width: 1.5rem;
    height: 1.5rem;
    background: url("/img/home/imooc-icon.png");
    background-size: cover;
  }
  .footer-tip .tip-text {
    display: inline-block;
    margin-left: 0.5rem;
    height: 1.5rem;
    font-size: 0.6rem;
    line-height: 1.5rem;
    color: #07111b;
  }
  .footer-tip .right-box .download-btn {
    width: 3.5rem;
    height: 1.5rem;
    margin-right: 1rem;
    background: #07111b;
    font-size: 0.6rem;
    line-height: 1.5rem;
    color: #FFFFFF;
  }
  .footer-tip .right-box .close-btn {
    margin-top: 0.3rem;
    font-size: 0.9rem;
    color: #FFFFFF;
    background: #999999;
    border-radius: 50%;
  }
  .share {
    width: 100%;
    position: fixed;
    bottom: 0;
    z-index: 10;
    background: #F3F5F7;
  }
  .share .share-list {
    width: 100%;
    padding: 1rem 0;
    text-align: center;
  }
  .share .share-list .share-item {
    width: 25%;
    padding: 1rem 0px;
  }
  .share .share-list .share-item img {
    width: 2rem;
    height: 2rem;
  }
  .share .share-list .share-item p {
    font-size: 0.6rem;
    color: #2B333B;
  }
  .share .cancel {
    width: 100%;
    height: 2.6rem;
    background: #FFFFFF;
    color: #2B333B;
    font-size: 0.9rem;
    line-height: 2.6rem;
    text-align: center;
  }
  body {
    background-color: #f3f5f7;
  }
  .pages {
    padding-top: 2.8rem;
    padding-bottom: 1.5rem;
  }
  .box {
    height: 4.5rem;
    width: 100%;
    background-color: #33384a;
  }
  .box .userheard {
    width: 2rem;
    height: 2rem;
    border-radius: 2rem;
    margin-top: 1.5rem;
    margin-left: 1rem;
    float: left;
  }
  .box .info {
    float: left;
    margin-top: 1.6rem;
    margin-left: 0.5rem;
  }
  .box .info .gray {
    color: #717481;
    font-size: 0.4rem;
  }
  .box .info p {
    color: #fff;
  }
  .group {
    display: -webkit-flex;
    /* Safari */
    display: flex;
    -webkit-justify-content: space-around;
    justify-content: space-around;
    font-size: 2rem;
  }
  .group {
    display: -webkit-flex;
    display: flex;
    -webkit-justify-content: space-around;
    justify-content: space-around;
    font-size: 1.3rem;
    background-color: #fff;
    margin-top: 0rem;
    padding-top: 1rem;
    padding-bottom: 1.2rem;
  }
  .group div {
    text-align: center;
  }
  .group div p {
    color: #2b333b;
    font-size: 0.6rem;
  }
  .group .imwap-I-of-course {
    color: #14b4ff;
    height: 2rem;
  }
  .group .imwap-I-practice {
    color: #ffa01e !important;
    height: 2rem;
  }
  .group .imwap-My-article {
    color: #20cc85;
    height: 2rem;
  }
  .group .imwap-my-question {
    color: #14b4ff !important;
    height: 2rem;
  }
  .list {
    width: 100%;
    background-color: #fff;
  }
  .list .box2 {
    height: 2.5rem;
    line-height: 2.5rem;
    color: #2b333b;
    font-size: 0.7rem;
    border-bottom: 1px solid #d9dde1;
  }
  .list .box2 img {
    margin: 0 0.7rem;
    vertical-align: text-bottom;
  }
  .list .box2 .url-tips{
      display: inline-block;
      float: right;
      padding-right:0.7rem;
      font-size: 0.6rem;
      color: #ff0000;
  }   
